import { constantRoutes } from '@/router'
import { getRouters } from '@/http/apis/index'
import Layout from '@views/layout/index'
import router from '@/router'
import ParentView from '@/components/parentView/index'
import InnerLink from '@/components/innerLink/index'
import auth from '@/plugins/auth'
import { isExternal } from '@/utils/validate'
const permission = {
    state: {
        routes: [],
        addRoutes: [],
        defaultRoutes: [],
        topbarRouters: [],
        sidebarRouters: []
    },
    mutations: {
        SET_ROUTES: (state, routes) => {
            state.addRoutes = routes
            state.routes = constantRoutes.concat(routes)
        },
        SET_DEFAULT_ROUTES: (state, routes) => {
            state.defaultRoutes = constantRoutes.concat(routes)
        },
        SET_TOPBAR_ROUTES: (state, routes) => {
            state.topbarRouters = routes
        },
        SET_SIDEBAR_ROUTERS: (state, routes) => {
            state.sidebarRouters = routes
        }
    },
    actions: {
        // 生成路由
        GenerateRoutes({ commit }) {
            return new Promise(resolve => {
                // 向后端请求路由数据
                getRouters().then(res => {
                    const sdata = JSON.parse(JSON.stringify(res.data))
                    const rdata = JSON.parse(JSON.stringify(res.data))
                    const sidebarRoutes = filterAsyncRouter(sdata)
                    const rewriteRoutes = filterAsyncRouter(rdata)
                    const asyncRoutes = filterDynamicRoutes(constantRoutes)
                    rewriteRoutes.push({
                        path: '*',
                        redirect: '/404',
                        hidden: true
                    })
                    for (let index = 0; index < asyncRoutes.length; index++) {
                        router.addRoute(asyncRoutes[index])
                    }
                    commit('SET_ROUTES', rewriteRoutes)
                    let newSidebarRoutes = constantRoutes
                        .concat(sidebarRoutes)
                        .filter(ele => {
                            return ele.hidden === false
                        })
                    commit('SET_SIDEBAR_ROUTERS', newSidebarRoutes)
                    commit('SET_DEFAULT_ROUTES', sidebarRoutes)
                    commit('SET_TOPBAR_ROUTES', sidebarRoutes)
                    resolve(rewriteRoutes)
                })
            })
        }
    }
}

// eslint-disable-next-line no-unused-vars
const filterAsyncRouter = (asyncRouterMap, lastRouter = false, type = false) =>
    asyncRouterMap.filter(route => {
        if (!isExternal(route.path)) {
            route.path = '/' + route.path
        }
        if (type && route.children) {
            route.children = filterChildren(route.children)
        }
        if (route.component) {
            // Layout ParentView 组件特殊处理
            if (route.component === 'Layout') {
                route.component = Layout
            } else if (route.component === 'ParentView') {
                route.component = ParentView
            } else if (route.component === 'InnerLink') {
                route.component = InnerLink
            } else {
                route.component = loadView(route.component)
            }
        }
        if (
            route.children !== null &&
            route.children &&
            route.children.length
        ) {
            route.children = filterAsyncRouter(route.children, route, type)
        } else {
            delete route['children']
            delete route['redirect']
        }
        return true
    })

// 遍历子路由
const filterChildren = (childrenMap, lastRouter = false) => {
    var children = []
    childrenMap.forEach(el => {
        if (el.children && el.children.length) {
            if (el.component === 'ParentView' && !lastRouter) {
                el.children.forEach(c => {
                    c.path = el.path + '/' + c.path
                    if (c.children && c.children.length) {
                        children = children.concat(
                            filterChildren(c.children, c)
                        )
                        return
                    }
                    children.push(c)
                })
                return
            }
        } else {
            el.path = '/' + el.path
        }
        if (lastRouter) {
            el.path = lastRouter.path + '/' + el.path
        }
        children = children.concat(el)
    })
    return children
}

// 动态路由遍历，验证是否具备权限
const filterDynamicRoutes = routes => {
    const res = []
    routes.forEach(route => {
        if (route.permissions) {
            if (auth.hasPermiOr(route.permissions)) {
                res.push(route)
            }
        } else if (route.roles) {
            if (auth.hasRoleOr(route.roles)) {
                res.push(route)
            }
        }
    })
    return res
}

const loadView = view => {
    if (view instanceof Object) {
        return ParentView
    } else {
        if (process.env.NODE_ENV === 'development') {
            return resolve => require([`@/views/${view}`], resolve)
        } else {
            // 使用 import 实现生产环境的路由懒加载
            return () => Promise.resolve(require(`@/views/${view}`).default)
        }
    }
}

export default permission
